I24.9
BillableAcute ischemic heart disease, unspecified
HCC Category Mapping
V28HCC 229 — Unstable Angina and Other Acute Ischemic Heart Disease
0.000V24HCC 87 — Unstable Angina and Other Acute Ischemic Heart Disease
0.274ESRDHCC 87 — Unstable Angina and Other Acute Ischemic Heart Disease
0.000RxHCCHCC 188 — Coronary Artery Disease and Angina
0.000What This Code Means
An acute heart condition caused by reduced blood flow to the heart muscle, without further specification of the type.
Coding Tips
- •This is a non-specific code; use only when the type of acute ischemic heart disease cannot be determined
- •Attempt to obtain more specific documentation to assign a more precise code from the I24 category
Clinical Significance
Acute ischemic heart disease, unspecified represents the least specific code in the acute ischemic heart disease category. It captures acute coronary events where the documentation does not provide enough detail to determine the specific type. This code should prompt coders to query for additional information, as more specific codes carry the same HCC value but demonstrate better documentation quality.
Documentation Requirements
- ✓Documentation of an acute cardiac ischemic event
- ✓Evidence that the specific type of acute ischemic heart disease cannot be determined
- ✓Clinical presentation consistent with acute ischemia
- ✓Results of diagnostic workup (even if inconclusive)
- ✓Treatment directed at the acute ischemic condition
Excludes 1 — Do NOT code together
- ischemic heart disease (chronic) NOS (I25.9)
Commonly Confused Codes
I25.9 — Chronic ischemic heart disease, unspecified: for chronic conditions, not acute presentationsI24.89 — Other forms of acute ischemic heart disease: slightly more specificI21.9 — Acute myocardial infarction, unspecified: if myocardial infarction criteria are metI20.0 — Unstable angina: if unstable angina is the documented presentationI20.9 — Angina pectoris, unspecified: for angina without confirmation of acute ischemic event
Code Hierarchy
└I24Other acute ischemic heart diseases└I24.9Acute ischemic heart disease, unspecified
└I24.9Acute ischemic heart disease, unspecified